Remove Windows beta issue template (#40650)

Release Notes:

- N/A

.github/ISSUE_TEMPLATE/06_bug_windows_beta.yml

@@ -1,35 +0,0 @@
-name: Bug Report (Windows Beta)
-description: Zed Windows Beta Related Bugs
-type: "Bug"
-labels: ["windows"]
-title: "Windows Beta: <a short description of the Windows bug>"
-body:
-  - type: textarea
-    attributes:
-      label: Summary
-      description: Describe the bug with a one-line summary, and provide detailed reproduction steps
-      value: |
-        <!-- Please insert a one-line summary of the issue below -->
-        SUMMARY_SENTENCE_HERE
-
-        ### Description
-        <!--  Describe with sufficient detail to reproduce from a clean Zed install. -->
-        Steps to trigger the problem:
-        1.
-        2.
-        3.
-
-        **Expected Behavior**:
-        **Actual Behavior**:
-
-    validations:
-      required: true
-  - type: textarea
-    id: environment
-    attributes:
-      label: Zed Version and System Specs
-      description: 'Open Zed, and in the command palette select "zed: copy system specs into clipboard"'
-      placeholder: |
-        Output of "zed: copy system specs into clipboard"
-    validations:
-      required: true